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Finding the Fourth Proportional to 1,362.91, 2,043.79 and 485.17

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Solution

The fourth proportional to 1,362.91, 2,043.79 and 485.17 is: 727.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.91 : 2,043.79 = 485.17 : x
  2. Step 2: Convert to fraction form
    1,362.91/2,043.79 = 485.17/x
  3. Step 3: Cross multiply
    1,362.91x = 2,043.79 × 485.17
  4. Step 4: Simplify right side
    1,362.91x = 991,585.59
  5. Step 5: Solve for x
    x = 991,585.59/1,362.91
  6. Step 6: Final answer
    x = 727.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.